The last is a line from what bids fair to be one of the management books of the year. Hard Facts, Dangerous Half-Truths and Total Nonsense (Harvard Business School Press), by Stanford professors Jeffrey Pfeffer and Robert Sutton, is a compelling tour of management conventional wisdom and why it so often turns out to be unwise, untrue and a stranger to fact - bollocks, in fact. Every potential manager should be made to read it before they are allowed to be in charge of anything, even a whelk stall.

